Explore the fundamentals of power electronics, the branch that uses solid-state components to convert and control high-power energy for applications like rectifiers, inverters, and DC-DC and AC-AC converters.

Explore how diodes act as one-way valves for current, enabling rectification and blocking reverse flow, and compare ideal and real models, including power dissipation and freewheeling protection.

Explains zener diodes for voltage regulation and clamping in inductive circuits, protecting switches and speeding current decay. Compares Schottky diodes’ low forward drop and fast switching for high-frequency applications.

The thyristor is a four-layer semiconductor with anode, cathode, and gate. It conducts when triggered by gate current, stays on above latching current, and turns off below holding current.

Analyze single phase ac supply with a thyristor and resistive or inductive loads. Learn how the delay angle alpha shapes average load voltage and current.

Explain forced commutation for a dc thyristor using a pre-charged capacitor to divert the anode current. Describe the resonant reversal circuit that recharges the capacitor and sets the switching frequency.

Explore the triac, a bidirectional switch built from two inverse-parallel thyristors with a single gate, used in ac applications like dimmers and motor controllers where firing angle controls load voltage.

Explore transistors, including NPN and PNP types, their three terminals: collector, emitter, base; base-emitter bias, beta, switching, and the safe operating area with thermal considerations.

Explore the metal oxide semiconductor field effect transistor (MOSFET) as a voltage controlled switch, amplifier, and resistor, with gate, source, drain, and gate charge shaping its operation.

Explore the insulated gate bipolar transistor (IGBT), a three-terminal power semiconductor combining MOSFET input impedance with BJT output power for efficient, fast switching in medium to high power applications.

Understand how the photocoupler or optocoupler uses light to transfer signals across an isolation barrier, keeping control circuitry safe from high voltages, with applications in microcontroller interfacing and PLC isolation.

Explore how a switch mode power supply uses pulse width modulation to efficiently convert AC to multiple DC outputs, with high-frequency transformers, rectification, EMI filtering, and a feedback photocoupler.

Explore how a switch mode power supply uses a rectifier, capacitor, high-frequency transformer, Schottky diode, and TL431 with an optocoupler to regulate output through transistor switching.

Explore how a varistor, a voltage-dependent resistor connected in parallel, provides bi-directional protection by clamping transient voltages and diverting surge energy.

Explore how thermistors, a temperature-dependent resistor, switch resistance with temperature, featuring NTC and PTC behavior, enabling precise temperature sensing, current limiting, and protection in power electronics.

Explore the application switch mode power supply (SMPS) architecture, from input rectification and high-frequency switching up to 100 kHz, to a transformer step-down, filter, and TL431/PC817-based feedback.

Explore how a switch mode power supply converts 220 volt ac to multiple isolated dc outputs through bridge rectification, a high-frequency transformer, TL431 feedback with an optocoupler, and LC filters.

Explore phase-controlled thyristor converters and diode rectifiers, regulating rms voltage via delay angle alpha in single-phase and three-phase bridges with four or six thyristors.

Explore how a four-diode single-phase converter rectifies AC to DC, defines average voltage via integration, and uses thyristors with a delay angle for phase control.

Extend a single-phase rectifier to a three-phase converter with two diodes, forming a six-pulse, 60-degree conduction sequence. Thyristors with delay angle alpha enable inversion and six-step output.

Explain overlap in three-phase thyristor converters, where commutation overlap yields a finite mu and reduces the average DC output voltage depending on load current, inductance, and frequency.

Explore hvdc transmission with a three-phase fully controlled thyristor converter acting as a rectifier and inverter to interconnect asynchronous ac grids via dc cables.

Explore phase controlled thyristor dc motor drives for variable speed, torque, and direction, with regenerative braking. Learn dual anti-parallel converters enabling four-quadrant operation and safe dead-band switching.

Explore how inverters convert dc to ac, enable energy return to the grid, and use PWM to produce sinusoidal outputs in single and three-phase configurations.

Explore dc to dc converters, using fixed-frequency chopping and duty cycle to control average load voltage; examine chopper circuits, h-bridge configurations, and inductive current behavior.

Explore the DC machine and how a chopper and H-bridge drive control torque and speed, including forward and reverse operation, regenerative braking, and mandatory interlocking time delays to prevent shot-through.

Enable regeneration by routing energy from a moving mechanical system back into the electrical supply through a transistor and diode, enabling regenerative braking and kinetic energy recovery.

Explore dc-dc converters, including buck and boost, and learn how switching transistors, inductors, and diodes regulate output with duty cycle in continuous and discontinuous conduction modes.

Explore how current in conductors creates magnetic fields, guided by the right-hand rule. Learn how solenoids produce bar magnet fields and toroids generate a uniform field around a ring core.

Explore electromagnetic systems by defining flux, flux density, and magnetomotive force, and apply the magnetic circuit analogy to compute MMF, field strength, reluctance, flux, and flux density.

Explore the ATX power supply and its switch-mode design, converting high-voltage AC to stable low-voltage DC with 3.3V, 5V, and 12V outputs, controlled by the SG6105 controller.

Explore the TL 494 and WT 7510 as command and control for an 80x switch-mode power supply, detailing pulse width modulation and safety monitoring.

Explore a secondary-side controlled heavy-bridge switch-mode power supply for the power electronics crash course, using TL494 and WT7510 to generate 5V standby, 12V, and 3.3V rails with PWM regulation.